Colour Perception and the Visual System
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Colour Perception and the Visual System

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Questions and Answers

What is the range of light wavelengths that short cones are sensitive to?

  • 495-570 nm
  • 380-420 nm
  • 620-750 nm
  • 450-495 nm (correct)
  • What determines the perceived colour when the brain processes signals from cones?

  • The number of cones in the retina
  • The type of pigment in the cones
  • The intensity of stimulation of each cone type (correct)
  • The wavelength of light received by the cones
  • What is the term for the inability to distinguish certain shades of colour?

  • Colour adaptation
  • Colour blindness (correct)
  • Colour vision deficiency
  • Colour perception
  • What is the purpose of the eyes adapting to changes in lighting conditions?

    <p>To optimise colour vision</p> Signup and view all the answers

    What is the role of the brain in colour vision?

    <p>To process signals from cones</p> Signup and view all the answers

    What is the range of light wavelengths that long cones are sensitive to?

    <p>620-750 nm</p> Signup and view all the answers

    What is the most common type of colour vision deficiency?

    <p>Deuteranomaly</p> Signup and view all the answers

    What is the function of cones in the eye?

    <p>To recognize lights based on their wavelengths</p> Signup and view all the answers

    What is the effect of Deuteranopia on colour perception?

    <p>Difficulty distinguishing between red and green colours</p> Signup and view all the answers

    What is the cause of Protanomaly?

    <p>Abnormal function of red-green cones</p> Signup and view all the answers

    What is the result of Tritanopia on colour perception?

    <p>Difficulty distinguishing between blue and yellow colours</p> Signup and view all the answers

    What is the principle of image formation that occurs when light passes from one medium to another?

    <p>Refraction of light</p> Signup and view all the answers

    What is the result of the loss of optic nerve axons in glaucoma patients?

    <p>Visual field defects</p> Signup and view all the answers

    What is the term for islands of reduced sensitivity surrounded by better vision areas in patients with glaucoma?

    <p>Scotomata</p> Signup and view all the answers

    How many types of cones are responsible for colour vision in the human retina?

    <p>Three</p> Signup and view all the answers

    What is the location of the specialised photoreceptor cells responsible for colour vision?

    <p>Macula</p> Signup and view all the answers

    What is the process by which light is converted into electrical signals in the eye?

    <p>Photoreception</p> Signup and view all the answers

    What is the term for the fundamental aspect of human perception that allows humans to distinguish and interpret colours?

    <p>Colour vision</p> Signup and view all the answers

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